1 /* 2 KHOMP generic endpoint/channel library. 3 Copyright (C) 2007-2009 Khomp Ind. & Com. 4 5 The contents of this file are subject to the Mozilla Public License Version 1.1 6 (the "License"); you may not use this file except in compliance with the 7 License. You may obtain a copy of the License at http://www.mozilla.org/MPL/ 8 9 Software distributed under the License is distributed on an "AS IS" basis, 10 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for 11 the specific language governing rights and limitations under the License. 12 13 Alternatively, the contents of this file may be used under the terms of the 14 "GNU Lesser General Public License 2.1" license (the “LGPL" License), in which 15 case the provisions of "LGPL License" are applicable instead of those above. 16 17 If you wish to allow use of your version of this file only under the terms of 18 the LGPL License and not to allow others to use your version of this file under 19 the MPL, indicate your decision by deleting the provisions above and replace them 20 with the notice and other provisions required by the LGPL License. If you do not 21 delete the provisions above, a recipient may use your version of this file under 22 either the MPL or the LGPL License. 23 24 The LGPL header follows below: 25 26 This library is free software; you can redistribute it and/or 27 modify it under the terms of the GNU Lesser General Public 28 License as published by the Free Software Foundation; either 29 version 2.1 of the License, or (at your option) any later version. 30 31 This library is distributed in the hope that it will be useful, 32 but WITHOUT ANY WARRANTY; without even the implied warranty of 33 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 34 Lesser General Public License for more details. 35 36 You should have received a copy of the GNU Lesser General Public License 37 along with this library; if not, write to the Free Software Foundation, Inc., 38 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 39 40 */ 41 42 #ifndef _SIMPLE_LOCK_COMMON_HPP_ 43 #define _SIMPLE_LOCK_COMMON_HPP_ 44 45 #include <config_commons.hpp> 46 47 #include <unistd.h> 48 #include <noncopyable.hpp> 49 50 #include <refcounter.hpp> 51 52 /* This struct uses static polymorphism, and derived classes should implement * 53 * the "lock/trylock/unlock()" methods for correct code compilation. * 54 * The base class also features reference counting, so derived classes should * 55 * implement the "unreference_data()" method for releasing resources. */ 56 57 template < typename Implementor > 58 struct SimpleLockCommon: COUNTER_SUPER( SimpleLockCommon < Implementor > ) 59 { 60 friend class ReferenceCounter < SimpleLockCommon < Implementor > >; 61 62 typedef enum 63 { 64 ISINUSE = 0, // operation not succeded (no error) 65 SUCCESS = 1, // operation succeded (no error) 66 FAILURE = 2, // mutex or state is somehow invalid (error! run for your life!) 67 } 68 Result; 69 SimpleLockCommonSimpleLockCommon70 SimpleLockCommon() 71 {}; 72 SimpleLockCommonSimpleLockCommon73 SimpleLockCommon(const SimpleLockCommon & o) 74 : COUNTER_REFER(o, SimpleLockCommon) 75 {}; 76 ~SimpleLockCommonSimpleLockCommon77 virtual ~SimpleLockCommon() 78 {}; 79 lockSimpleLockCommon80 inline Result lock() 81 { 82 return static_cast<Implementor*>(this)->lock(); 83 } 84 trylockSimpleLockCommon85 inline Result trylock() 86 { 87 return static_cast<Implementor*>(this)->trylock(); 88 } 89 unlockSimpleLockCommon90 inline void unlock() 91 { 92 static_cast<Implementor*>(this)->unlock(); 93 } 94 95 protected: unreferenceSimpleLockCommon96 void unreference(void) 97 { 98 static_cast<Implementor*>(this)->unreference_data(); 99 } 100 }; 101 102 #include COMMONS_INCLUDE(simple_lock.hpp) 103 104 #endif /* _SIMPLE_LOCK_COMMON_HPP_ */ 105